The functions sin⁡z and cos⁡z are entire. In ℂ the zeros
of sin⁡z are z=k⁢π, k∈ℤ; the zeros of cos⁡z are
z=(k+12)⁢π, k∈ℤ. The functions
tan⁡z, csc⁡z, sec⁡z, and cot⁡z are meromorphic, and the
locations of their zeros and poles follow from (4.14.4) to
(4.14.7).